I think Phase 4 only feels directionless because it's essentially the new Phase One. And instead of setting up one Avengers movie to tie up all of the varying threads, I believe we are instead going to get multiple team ups/branches of the MCU:
1. The Cosmic side of Marvel — Captain Marvel, Thor, Guardians of the Galaxy, Fantastic Four and Eternals
2. Young Avengers — Kate Bishop, Cassie Lang, Ms. Marvel, Wiccan (Billy), Speed (Tommy), Patriot, Hulkling and America Chavez.
3. Street-level Avengers — Daredevil, Jessica Jones, Echo, Hawkeye
4. Midnight Sons — Blade, Black Knight (Dane Whitman), Ghost Rider, Moon Knight, Werewolf By Night
5. Mutants/X-men
6. A New Avengers Team (Sam Wilson, Bucky, Shang-Chi, Ant-man and the Wasp, She-Hulk, New Black Panther, possibly Yelena)
7. Possibly a new Illuminati team led by Dr. Strange? This is where all of the multiverse hereos will come into play.